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研究生:陳以中
研究生(外文):Yi-chung Chen
論文名稱:研磨條件對薄板工件平行度之影響
論文名稱(外文):The Effects of Grinding Conditions on Parallelism of Thin Workpieces
指導教授:王俊志
指導教授(外文):Jiunn-jyh Wang
學位類別:碩士
校院名稱:國立成功大學
系所名稱:機械工程學系碩博士班
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:56
中文關鍵詞:工件平行度工件厚長比研磨條件薄板工件
外文關鍵詞:slender workpiecethickness-to-length ratioparallelismgrinding conditions
相關次數:
  • 被引用被引用:2
  • 點閱點閱:350
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  • 下載下載:45
  • 收藏至我的研究室書目清單書目收藏:0
薄板工件研磨製程中,隨著工件厚度減少或長度增加,常面臨到難以掌握工件翹曲程度之困難。本文根據ASME Y14.5規範,以平行度描述薄板翹曲程度,並以樑變形理論為基礎,結合一無因次化因子-工件厚長比,建立一套薄板工件平行度預測模式。模式考慮材料楊氏係數與工件慣性矩,以工件兩端端面受到彎矩而翹曲後,工件中心點位置不變為前提,探析工件厚長比與薄板工件平行度之關係。並以氧化鋁砂輪研磨碳鋼薄板工件為例,在不同切深與工件進給速度下,探討工件厚長比對薄板工件平行度之影響,由實驗結果得知,薄板工件平行度與工件厚長比呈現平方反比的關係。透過此模式選擇之研磨條件,亦可有效的將加工道次從30次減少至14次,並使薄板工件平行度提昇76%。
Workpieces after grinding process might bend or deflect due to thermal deformation and induced residual stress after grinding process, especially for slender workpiece with low thickness-to-length ratios. In this paper, the bending extent of thin workpieces is investigated as a parallelism property of thin plate as defined in the ASME Y14.5 Standard. A model for predicting the parallelism prediction of thin workpieces is developed based on the beam deformation theory by using and combined with a dimensionless factor, the thickness-to-length ratio, as a characteric parameter. This model considers Young’s modulus and moment of inertia of area, and assumes the central position of workpieces does not change as bending moments act on the both sides of workpiece. The relationship between thickness-to-length ratio and parallelism of thin workpieces has been analyzed and discussed. Under different cut depths and feed speeds, grinding experiments have been carried out on carbon steel with using an alumina grinding wheel. Experiment results indicate that the relationship between thickness-to-length ratio and parallelism of thin workpieces has an inverse-square relationship. As an application, the use of this model results in giving an indication of grinding conditions with reduced grinding passes from 30 to 14 and improved parallelism of thin workpieces by 76%.
摘要 I
Abstract II
誌謝 III
目錄 IV
表目錄 VI
圖目錄 VII
符號說明 X
第一章 緒論 1
1.1前言 1
1.2文獻回顧 2
1.3 研究動機與目的 5
1.4研究方法與範疇 6
第二章 研磨熱理論與薄板工件平行度預測模式之建立 8
2.1 前文 8
2.2 研磨熱理論 9
2.2.1 研磨熱來源與研磨過程 9
2.2.2 砂輪與工件接觸弧長 11
2.2.3 溫升理論 13
2.3 薄板工件平行度預測模式之建立 17
2.4薄板工件平行度預測模式之模擬 21
第三章 實驗方法與結果討論 24
3.1 實驗目的 24
3.2 實驗材料 26
3.3 實驗設備 26
3.4 實驗進行步驟 28
3.5 實驗條件 33
3.6 結果與討論 37
3.6.1 非接觸式線上平行度量測方法 37
3.6.2 不同研磨方式對薄板工件平行度影響之探討 39
3.6.3 不同工件尺寸對薄板工件平行度影響之探討 44
3.6.4薄板工件平行度預測模式之應用與驗證結果 46
第四章 結論與建議 50
4.1結論 50
4.2建議 51
參考文獻 52
自述 56
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